| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2019/2020 | Premier League (Wales) | 14 | 1205 | 0 | 0 | 0 | — |
| 2020/2021 | Premier League (Wales) | 16 | 1297 | 0 | 0 | 0 | — |
| 2022/2023 | Premier League (Wales) | 7 | 406 | 1 | 0 | 0.22 | — |
| 2023/2024 | Premier League (Wales) | 21 | 1595 | 0 | 0 | 0 | 7.19 |
| 2024/2025 | Premier League (Wales) | 13 | 1080 | 1 | 0 | 0.08 | — |
Domestic league competitions only (SportMonks sub_type='domestic'); national-team, continental and cup competitions are excluded. Classification resolved by league id against the canonical leagues index. G+A/90 computed from minutes actually played.
Figures computed from the GioScore season-stats database · as of 2026-07-21
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Cardiff MU | 6 | 4 | 1 | 1 | 0 | 0 | 0 | 0 |
 Newtown AFC | 4 | 2 | 0 | 2 | 0 | 0 | 1 | 0 |
 The New Saints | 3 | 1 | 0 | 2 | 0 | 0 | 0 | 0 |
 Aberystwyth Town | 3 | 2 | 0 | 1 | 0 | 0 | 0 | 0 |
 Bala Town | 3 | 0 | 3 | 0 | 0 | 0 | 1 | 0 |
 Penybont | 3 | 1 | 0 | 2 | 0 | 0 | 1 | 0 |
 Haverfordwest County | 3 | 0 | 1 | 2 | 0 | 0 | 1 | 0 |
 Connah's Quay | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
 Pontypridd Town AFC | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Clyde | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Airbus UK | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Colwyn Bay | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Carmarthen Town | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Flint Town United | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Briton Ferry | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Ammanford | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
In 2024/2025, Gruff John Williams hit 1 goal over 13 Premier League (Wales) outings (1,080 minutes) and provided no assists — 0.08 goal involvements per 90.
His league record spans 5 seasons (2019–2024), all with a single club.
